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Khabre desk
Recent reporting, analysis and explainers from the astrophysics desk.
science
A Nature Astronomy study finds that tidal disruption events produce a second outflow when accretion falls to about 2% of the Eddington limit. The result points to a scale-invariant link between accretion and jet formation in stellar-mass and supermassive black holes.
science
A new set of cosmological radiation-hydrodynamic simulations shows that heavy black hole seeds of about a million solar masses form naturally in dense protocluster regions, undergo a super-Eddington accretion phase that reproduces the spectral features of little red dots, and then grow into the overmassive black holes observed by the James Webb Space Telescope.
science
Researchers have found that supermassive black hole winds are roughly 100 times more powerful than previously estimated, carrying energy across distances of about 300,000 light-years. The discovery, based on X-ray observations of a quasar 3.4 billion light-years away, shows these outflows extend far beyond their host galaxies.
science
Astronomers found 84 unusually low-energy X-ray sources in six galaxies by searching publicly available Chandra data. Their physical nature remains unknown, but they may involve accreting black holes, neutron stars or white dwarfs.